I'm battling with a high CPU problem on a Cisco 3825 router (C3825-ADVIPSERVICESK9-M, Version 12.3(14)T7). I have identified packet marking (rate-limit with set-prec-transmit) as the culprit.
When the rate-limiting is enabled, it is marking only about 8mbit of the input traffic. In this configuration, the router's CPU hits 100% at about 140Mbps of combined in/out traffic, and it is unable to handle any more.
When I switch off the rate-limiting, the router passes the required load of about 200mbit/sec with under 30% CPU utilisation.
Should rate-limits be causing such high CPU usage, considering that only a small amount of input traffic is being marked? If so, is there a better strategy to mark packets which will use less CPU? There are about 25 rate-limits marking 25 different ACLs.
One might be that this feature possibly isn't supposed to be on that platform.
At least on the 28xx series, it existed on the early 12.4 mainline releases but was later "fixed" (pulled). Queried TAC about this "fix", and was told it was pulled because the feature isn't supported on the lower end router platforms.
Otherwise, the only "negative" I've seen with it on any platform is its usage of some additional RAM.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.